PLATE 43 



Dalmanella penouili nov. 



Page 242 



I, 3 Views of ventral valve, x 3 

 2 View of dorsal valve, x 3 



4 A smaller ventral valve, x 3 

 Gaspe sandstone. Gaspe Basin 



Orthostrophia canadensis nov. 



Page 112 



5 Internal cast of ventral valve, ~^ lY^ 



St Alban beds. Grande Cavee, Griffon Cove river 



6 Internal cast of dorsal valve 



St Alban beds. Cape Rosier Cove 



Rhipidomella lehuquetiana nov. 



Page 202 



7 Interior of ventral valve restored at the left, x 2 

 8, 9 Interior of dorsal valves, x 2 



10, II Exterior and interior of a ventral valve, showing the character of 

 the shell, the senile expression of the foramen and cardinal thick- 

 ening, and the large size of the adductor scars, x 2 



12 Interior of ventral valve in which the adductor scars are obscure, x 2 



13 Exterior of a ventral valve. All these are from silica replacements 

 Grande Greve limestone. Grande Greve 



Rhipidomella musculosa Hall 



{^See plate 42) 

 Page 2or 



14 Cardinal view of the dorsal valve, showing the process and crura; a 



silica replacement, x 2 

 17, 19 Internal casts of brachial valves 

 20 Exterior of a ventral valve ; a silica replacement 

 22 Interior of a ventral valve ; a silica replacement 



Grande Greve limestone ; divisions i and 2. Grande Greve 



338 



